Horizontal Convergence and the Occurrence of Summer Precipitation at Miami, Florida

The Bellamy nomograph is applied to a triangle over southeastern Florida and adjacent waters to compute the horizontal divergence and convergence in the lower levels for the period June–August 1951. The general diurnal pattern and the extent of the sea-breeze effect are established and graphed, as are the variations in the pattern between wet and dry days. A comparison is made between the results of this study and those obtained from a similar investigation in central Florida. The relationship between the partial and total convergence values and the occurrence of precipitation is examined. The short test period and lack of data prevent any determination of valid forecast rules but a study of the charted data reveals several promising leads meriting further investigation.